CN104552805A - Glue feeding mechanism - Google Patents

Abstract

A glue feeding mechanism is applied in a mold, the mold includes a female mold core, a male mold core, a male template with a hot runner and a lower ejector plate, the glue feeding mechanism includes: a runner, which is arranged on the The male mold core is in communication with the hot runner, and the direction of glue feeding is the vertical direction. The runner includes a first vertical section, a horizontal section and a second vertical section. The two ends of the horizontal section are respectively Vertically connected to the first vertical section and the second vertical section; an oblique pin, one end of which is set in the male mold core, the other end is placed in the male template, and the oblique pin is placed in the male template The end is provided with a slide slot; and an ejection part, one end of which is set on the lower ejection plate, and the other end is placed in the slide slot. The glue feeding mechanism of the present invention sets multi-stage buffer structure flow channels in the male mold core to release and disperse the injection pressure and inject it into the mold cavity in a gentle manner. Glue marks.

Description

Glue feeding mechanism

【Technical field】

The invention relates to a glue feeding mechanism, in particular to a glue feeding mechanism applied in a mold.

【Background technique】

In the case that there is an appearance on the side of the master mold, it is necessary to adopt the glue feeding method of the pouring mold. The pouring mold is a mold with a runner system in the male mold. At present, the pouring mold generally adopts the following two glue feeding methods:

Method 1, please refer to Figure 1, which is a schematic cross-sectional view of a direct glue feeding mechanism in the prior art. When the product 13 is injection molded, molten plastic is injected into the mold cavity through the hot runner 12 and the cone runner 11, Taking the direction of glue feeding as the vertical direction, since the hot runner 12 and the cone runner 11 are vertically connected and neither has a buffer structure, and the injection pressure of the plastic is high, it is easy to be in the middle of the product 13 when it is molded. There are glue marks on the appearance, which affects the appearance of product 13;

Method 2, please refer to Figure 2, which is a schematic cross-sectional view of a common glue feeding mechanism in the prior art, with the glue feeding direction as the vertical direction, and one side of the vertical flow channel 21 correspondingly connected with an oblique pin 22, which is used in injection molding products. At 13:00, the molten plastic is injected into the mold cavity through the hot runner 12 and the vertical runner 21. Because the hot runner 12 and the vertical runner 21 are vertically connected and there is no buffer structure, and the injection pressure of the plastic Too large, so it is easy to leave glue marks on the appearance of the product 13 when it is molded, which affects the appearance of the product 13.

In view of this, it is necessary to provide a glue-feeding mechanism that can solve the problem of glue-feeding marks on the appearance of injection-molded products in the above-mentioned technologies.

【Content of invention】

Therefore, the object of the present invention is to provide a glue feeding mechanism, which can solve the above-mentioned problem of glue feeding marks left on the appearance of injection molded products.

In order to achieve the above object, the glue feeding mechanism of the present invention is applied in a mold. The mold includes a female mold core, a male mold core, a male template with a hot runner and a lower ejector plate. The glue feeding mechanism include:

A flow channel, which is arranged in the male mold core and communicates with the hot runner, takes the direction of glue feeding as the vertical direction, and the flow channel includes the first vertical direction from top to bottom in the direction of glue feeding. segment, a horizontal segment and a second vertical segment, the two ends of the horizontal segment are vertically connected to the first vertical segment and the second vertical segment respectively;

One oblique pin, one end of the oblique pin is arranged in the male mold core, the other end is placed in the male template, and the end of the oblique pin placed in the male template is provided with a sliding groove; and

An ejection part, one end of the ejection part is arranged on the lower ejection plate, and the other end is placed in the sliding groove.

Preferably, the runner communicates with the hot runner through the first vertical section.

Preferably, the end of the oblique pin disposed in the male core is in corresponding contact with the horizontal section and the second vertical section.

Preferably, a relief groove is provided in the male template, and the end of the oblique pin arranged in the male template is placed in the relief groove.

Compared with the prior art, the glue feeding mechanism of the present invention sets a multi-stage buffer structure flow channel in the male mold core, so that after the plastic entering the flow channel passes through the multi-stage buffer of the flow channel, the injection pressure is gradually released and dispersed And it is injected into the mold cavity in a gentle way, so after the product is formed, there will be no glue marks on its appearance.

【Description of drawings】

FIG. 1 shows a schematic cross-sectional view of a direct glue feeding mechanism in the prior art.

FIG. 2 shows a schematic cross-sectional view of a common glue feeding mechanism in the prior art.

FIG. 3 is a schematic cross-sectional view of the glue feeding mechanism of the present invention.

Fig. 4 shows a schematic cross-sectional view of the mold opening of the glue feeding mechanism of the present invention.

【Detailed ways】

Please refer to Figure 3 and Figure 4, wherein Figure 3 is a schematic cross-sectional view of the glue feeding mechanism of the present invention, and Figure 4 is a schematic cross-sectional view of the glue feeding mechanism of the present invention when the mold is opened.

The glue feeding mechanism of the present invention is applied in a mold, and the mold includes a female mold core 100, a male mold core 101, a male template 103 provided with a hot runner 102 and a lower ejector plate 104, in this embodiment , please refer to Figure 3, the glue feeding mechanism includes:

A flow channel 105, the flow channel 105 is arranged in the male mold core 101, and one end of the flow channel 105 communicates with the hot runner 102. In this embodiment, the flow channel 105 has a stepped structure to facilitate the injection The direction is the vertical direction, and the flow channel 105 includes a first vertical section 1051, a horizontal section 1052 and a second vertical section 1053 from top to bottom in the direction of glue feeding, and the two ends of the horizontal section 1052 are respectively vertically connected to the first vertical section 1051 and the second vertical section 1053;

One oblique pin 107, one end of the oblique pin 107 is arranged in the male mold core 101, the other end is placed in the male template 103, and the end of the oblique pin 107 placed in the male template 103 is provided with a sliding groove; and

An ejection part 108, one end of the ejection part 108 is set on the lower ejection plate 104, and the other end is placed in the sliding groove.

Wherein, the runner 105 communicates with the hot runner 102 through the first vertical section 1051 .

Wherein, the end of the oblique pin 107 disposed in the male core 101 is in corresponding contact with the horizontal section 1052 and the second vertical section 1053 .

Wherein, described male formwork 103 is provided with a space-avoiding groove 106, and the end that oblique pin 107 is arranged in the male formwork 103 is placed in this space-avoiding groove 106, and this space-avoiding groove 106 can be inclined when mold opening. Pin 107 provides sufficient room for movement.

In this embodiment, please refer to FIG. 3. When the mold is closed, the molten plastic is injected into the runner 105 through the hot runner 102, and the flow process of the plastic in the runner 105 is as follows: the plastic passes through the hot runner 102 at the end. It is first injected into the first vertical section 1051, then injected into the horizontal section 1052 through the first vertical section 1051, and then injected into the second vertical section 1053 through the horizontal section 1052. After buffering, it is gradually released and dispersed. Finally, the plastic is injected into the mold cavity through the second vertical section 1053 in a gentle manner. When the mold cavity is full, the injection of plastic is stopped, and the molding of the product 13 is completed.

In this embodiment, please refer to FIG. 4. When the mold is opened, the lower ejector plate 104 moves upward with the direction of glue feeding as the vertical direction, driving the ejector pin 109 and the ejector part 108 to move upward at the same time. Since the ejector part One end of 108 is placed in the sliding groove, so the ejector part 108 will not break away from the oblique pin 107 during the movement, and the oblique pin 107 moves obliquely upwards after being subjected to the active force of the ejector part 108, that is, the oblique pin 107 moves upward and downward at the same time. Moving to the right, the oblique pin 107 breaks away from the formed plastic in the flow channel 105. In addition, the product 13 is pushed upward by the force of the thimble 109 and separated from the male mold core 101. Since the formed plastic in the flow channel 105 is connected with the product 13 As a whole, the molded plastic in the runner 105 moves upwards with the product 13 at the same time, the product 13 is taken out, the mold is closed, and the next injection molding of the product 13 starts.

Compared with the prior art, the glue feeding mechanism of the present invention sets a multi-stage buffer structure flow channel 105 in the male mold core 101, so that after the plastic entering the flow channel 105 passes through the multi-stage buffer of the flow channel 105, the injection pressure gradually increases. It is released and dispersed and injected into the mold cavity in a gentle manner, so that after the product 13 is molded, no glue marks will be left on its appearance.

Claims (4)

1. A glue feeding mechanism is applied in a mould. The mold includes a female die core, a male mold core, a male template provided with a hot runner and a lower ejector plate, and it is characterized in that the glue feeding mechanism includes : A flow channel, which is arranged in the male mold core and communicates with the hot runner, takes the direction of glue feeding as the vertical direction, and the flow channel includes the first vertical direction from top to bottom in the direction of glue feeding. segment, a horizontal segment and a second vertical segment, the two ends of the horizontal segment are vertically connected to the first vertical segment and the second vertical segment respectively; One oblique pin, one end of the oblique pin is arranged in the male mold core, the other end is placed in the male template, and the end of the oblique pin placed in the male template is provided with a sliding groove; and An ejection part, one end of the ejection part is arranged on the lower ejection plate, and the other end is placed in the sliding groove. 2. The glue feeding mechanism according to claim 1, wherein the runner communicates with the hot runner through the first vertical section. 3 . The glue feeding mechanism according to claim 1 , wherein the end of the oblique pin disposed in the core of the male die is in corresponding contact with the horizontal section and the second vertical section. 4 . 4 . The glue feeding mechanism according to claim 1 , wherein a space-avoiding groove is provided in the male formwork, and the end of the oblique pin arranged in the male formwork is placed in the space-avoiding groove. 5 .